Improved curtain-fixture



UNITED STATES PATENT OEEroEa JACOB DAVID, 0F NEW YORK, N. Y.

IMPROVED CURTAIN-FIXTURE.

Specification forming part of Letters Patent No. 69.189, dated September '34, 1867.

To all whom it may concern.:

Be it known that I, JACOB DAVlD, ot New York city, 20 Ann street, in the county and Sta-te of New York, did invent a new and uselul Improvement in Shade-liixtures and I do hereby declare that the following is a full, clear, and exact description thereof', which will enable those skilled in the art to make and use the saine, reference being had to the accompanying drawing, forming part ot' this specification, in which drawing- Figure l is a longitudinal section ot a shaderoller made according to my invention. Fig. 2 is an elevation ofthe journalbox j', which performs the double ottice of supporting one end of the roller and of stopping its revolution when desired, and thereby preventing the winding up of the curtain.

Similar letters indicate corresponding parts.

This invention consists in a novel construction of shade-fixtures, in which I arrange the spring' that winds up the shade and the detent that arrests the action of said spring in the same end of the roller, whereby 1 am enabled to combine a spring and detent with a common solid wooden roller, a socket for the spring being bored out in one end of the roller, and the other end being leit in its natural condition, so that it can be iitted to a window by sawing' oft' any excess in length in the same manner as plain wooden rollers without automatic spring-fixtures are now shortened and fitted.

My invention is applicable to shade-rollers of any material.

rIhe letter a designates a wooden shaderoller. A cavity or socket, b, is bored out in one end to receive the spring' c and the rod cl, to which said spring is attached. The outer end rod, d, extends through the protectingplate which covers the perforated end of the roller, and said outer end of the rod is squared or iiattened to enable it to fit a slot of corresponding form made in the journal-box f, by which means the rod d is prevented from turning with the roller. rIhe spring c is wound around the rod, one end of the spring being fastened to said rod near its outer end, and the other end of the spring being lixed to a block or cross-head, g, which is loose upon the rod, but which is prevented from turning bya pin, h, which extends from the periphery of the cross-head and enters a slot, fi, which intersects the socket or hollow of the roller nearits inner end. The slot is made long' enough to allow for the sliding ofthe crosslhead g along the rod to and fro as the spring' is alternately shortened and lengthened on heilig' wound and unwound upon said rod, the pin h moving to and fro in the slot, and preventing the crosshead from turning on the rod.

The slot in journal-box f, which receives the end of rod d, is open at its right-hand side, near the top, to let the rod enter and be removed at pleasure, the opening being so arranged and formed that one part, j, the left-hand side in Fig. 2, is higher than the right-hand side, and is vertical, so that it will stop the winding up of the shade by arresting the roller through the action of the arm or detent k, which is hinged in a radial slot in the same end of the roller which contains the spring', said detent being arranged in the plane of the axis of the roller, its free end working through a radial slot in the protecting-plate e, so that the movement of the end of the arm or detent is toward and away from the axis of the roller, centrifugal action (when the roller is rapidly turned) sending the detent outward, at which times it will pass over the elevated side j of the journal-box j'. Yhen the roller is moving slowly, or is in a state of rest, the action of gravity brings the detent toward the center of the roller at these times, when the detent is above the center, and at such times said detent engages the said part j, and the revolution of the roller is arrested.

The height of the part j of the journal-box is such as to allow the arm lt' to fall against it when it is near the center of the roller, which position it occupies whenever the roller in turning' brings the arm above the axis, unless when turning at a high speed, in which case centrifugal action carries the arm far enough away from the axis or center of the roller to allow it, pass over the side j of the box. The outside of the party is rounded ofi", so that the arm k will ride over it with ease when the roller is being turned against its spring, as when unwinding the shade.

The solid end of the roller, after the roller has been sawedoii1 and fitted to the place it is to occupy in a Window, is tted with the usual plate l, from the center of which projects a iournal that is received in a journa1boX,m, which is screwed to the Window-casing.

My invention enables me to make use oi' wooden rollers iu shade-fixtures which Wind or draw up their shades automatically, and thereby to cheapen and simplify them, both in cou-' which cannot be shortened Without destroying or injuring the roller.

What I claim as new, and desire to secure by Letters Patent, is

1. The arm or detent 7c, arranged upon the roller in such a manner that it moves toward and away from the center or axis of the roller a by the action of gravity and centrifugal force, substantially as described.

2. The combination and arrangement, at the same end of a shade-roller, of the spring e, rod d, and arm or detent 7c, or their mechanical equivalents, substantially as described.

This speciiication signed by me this 27th day of July, 1867.

J AGOB DAVID. 

